S.O Low
Your boiler is working correctly but is currently in standby because it hasn't received a signal from your thermostat to turn the heating on.
Technical description: Heating issue, no heat demand
Typical repair cost: £0-120 (including labour)
DIY fix possible
Check that your room thermostat is turned up higher than the current room temperature.Ensure your heating programmer or app is set to an 'On' period.Replace the batteries in your wireless thermostat if the screen is blank or showing a low battery symbol.
Protect yourself from future repair bills
A boiler cover plan would cover faults like S.O — no call-out fees, no surprises.
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Parts commonly replaced
- Thermostat batteries
- Room thermostat
- External programmer
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